Company lists · Data refreshed October 2026

Top 20 Infrastructure construction contractors based in Seattle, United States

Name: Infrastructure construction contractors based in Seattle, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 16, 2026 30 companies tracked

RevenueBase identified 30 company matches for infrastructure construction contractors associated with Seattle, United States as of October 2026 and tracks 1,710 professional contacts across them, including 887 with verified work emails. Across the United States, Houston is the largest hub for this category (165 companies); Seattle has 30.

This list covers company matches for infrastructure construction contractors associated with Seattle, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 16, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 16, 2026 How this list was built

30Companies

1,710Contacts tracked

887Verified emails

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The 20 largest infrastructure construction contractors based in Seattle, United States

Ranked by team size

Top 20 of 30 company matches for infrastructure construction contractors based in Seattle, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 16, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Manson Construction CO	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	501-1,000	611 contacts →
	Exact match “Manson is one of the nation’s leading heavy civil marine construction and dredging companies.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
2	Delve Underground	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	201-500	307 contacts →
	Exact match “Delve Underground is a leader in heavy civil engineering, serving the transportation, water, wastewater, and energy industries.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
3	Magnusson Klemencic Associates	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	51-200	196 contacts →
	Exact match “We engineer the future of the built environment, one structure, skyline, and community at a time.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
4	Pacific Pile & Marine	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	51-200	112 contacts →
	Exact match “Pacific Pile & Marine (PPM) is a heavy civil and marine general contractor.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
5	Gray & Osborne	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	51-200	103 contacts →
	Exact match “Municipal Engineering Services” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
6	Scarsella Bros., INC	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	51-200	101 contacts →
	Exact match “Scarsella Brothers is a leading heavy civil contractor in the Pacific Northwest, and has been building their reputation since 1945.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
7	ABKJ	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	11-50	67 contacts →
	Exact match “Andersen Bjornstad Kane Jacobs (ABKJ) is a premier consulting design firm in the United States.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
8	Marine Equipment Solutions	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	201-500	42 contacts →
	Exact match “Marine Equipment Solutions (MES) unites some of the most respected names in the marine and heavy construction industry under one trusted brand: Rasmussen Equipment Company…” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
9	Integrated Design Engineers	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	11-50	19 contacts →
	Exact match “Integrated Design Engineers (idE) is a Seattle-based structural engineering consulting firm founded in 2005.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
10	SCI Infrastructure	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	51-200	18 contacts →
	Exact match “SCI INFRASTRUCTURE, LLC is an established Heavy Civil, Site Work and Road Construction Contractor with headquarters located in SeaTac Washington.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
11	LPD Engineering Pllc	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	11-50	18 contacts →
	Exact match “Improving our communities through economical, functional and sustainable civil design solutions.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
12	Jansen INC	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	51-200	14 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
13	Hainline	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	11-50	12 contacts →
	Exact match “HAINLINE was founded in 1981 to assist owners, architects, and contractors in the construction process.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
14	Deeny Construction CO INC	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	1-10	11 contacts →
	Exact match “Deeny Construction Co Inc is an Utilities company located in 2545 Rainier Ave S, Seattle, Washington, United States.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
15	RHC Engineering	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	11-50	8 contacts →
	Exact match “RHC Engineering is specialized in bridge and structural design.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
16	CM Design Group	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	1-10	6 contacts →
	Exact match “CM Design Group, LLC is a Seattle based civil engineering design firm established in 2011.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
17	V M Structural Design, INC	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	1-10	6 contacts →
	Exact match “V+M Structural Design, Inc.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
18	Coterra Engineering, Pllc	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	1-10	5 contacts →
	Exact match “Located in the Phinney Ridge neighborhood of Seattle, Coterra provides civil engineering services to private organizations and public agencies, offering a range of expertise in…” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
19	Thorco Construction	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	1-10	3 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
20	Transcon Company LLC	Exact match	Seattle, WA, United StatesHQ recorded Oct 16, 2026	1-10	1 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “infrastructure construction contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 20 of 30 infrastructure construction contractors based in Seattle, United States

See the full list, filter by size, metro and specialty, and access 887 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Infrastructure construction contractors based in Seattle, United States at a glance

As of Oct 16, 2026

51.9%Verified-email coverage

57.0Average contacts per company

11-50Median size (employees)

Oct 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for Seattle, so it is reported there. Company counts and contact totals on this page are exact for Seattle, over 30 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Seattle, United States whose business descriptions match “infrastructure construction contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 887 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on October 16, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Infrastructure construction contractors by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “infrastructure construction contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many infrastructure construction contractors are there based in Seattle, United States?

RevenueBase identified 30 company matches for infrastructure construction contractors associated with Seattle, United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Manson Construction CO tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most infrastructure construction contractors?

Houston leads the United States with 165 company records, followed by New York (71) and Phoenix (64). Seattle has 30.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 887 professional contacts with verified work emails tracked across these 30 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 16, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.